#myInput {
    background-image: url('images/searchicon.png'); 
    background-position: 10px 12px; /*图片定位 */
    background-repeat: no-repeat; /* 不重复图片 */
    font-size: 16px;
    padding: 12px 20px 12px 40px;
    border: 1px solid #ddd;
    margin-bottom: 12px;
    }
    #myTable {
    border-collapse: collapse;
    width: 100%;
    border: 1px solid #ddd;
    font-size: 18px;
    }
    #myTable th,
    #myTable td {
    text-align: left;
    padding: 12px;
    }
    #myTable tr {
    /* 表格添加边框 */
    border-bottom: 1px solid #ddd;
    }
    #myTable tr.header,
    #myTable tr:hover {
    /* 表头及鼠标移动过 tr 时添加背景 */
    background-color: #f1f1f1;
    }